R1(config)#interface FastEthernet 0/0 R1(config-if)#ip address dhcp client-id FastEthernet 0/0 The command above tells the router to use the MAC address on the FastEthernet 0/0 interface as the client ID.
Dhcp Client Id
I am having the same problem, in addition to some other strange DHCP happenings.
We are getting many IP conflicts. Our clients come up with a message from IP Configuration which says (for example) '192.168.1.60 is in use by 43:68:61:6e:67:65 DHCP Server 192.168.1.10'
DHCP scopes have been recreated along with /etc/bootpd.plist /var/db/dhcpd_leases
Here is a snipit from a log to show you some of the strangeness. Any advice would be greatly appreciated.
Feb 16 15:19:37 RMSInfoServer bootpd[64239]: dhcpd: IP 192.168.1.46 declined by 0,43:68:61:6e:67:65:5f:4d:65
Feb 16 15:19:37 RMSInfoServer bootpd[64239]: service time 0.000715 seconds
Feb 16 15:19:37 RMSInfoServer bootpd[64239]: DHCP DECLINE [en0]: 0,43:68:61:6e:67:65:5f:4d:65
Feb 16 15:19:37 RMSInfoServer bootpd[64239]: service time 0.000167 seconds
Feb 16 15:19:37 RMSInfoServer bootpd[64239]: DHCP DECLINE [en0]: 0,43:68:61:6e:67:65:5f:4d:65
Feb 16 15:19:37 RMSInfoServer bootpd[64239]: service time 0.000093 seconds
Feb 16 15:19:37 RMSInfoServer bootpd[64239]: DHCP DECLINE [en0]: 0,43:68:61:6e:67:65:5f:4d:65
Feb 16 15:19:37 RMSInfoServer bootpd[64239]: service time 0.000121 seconds
Feb 16 15:19:47 RMSInfoServer bootpd[64239]: DHCP DISCOVER [en0]: 0,43:68:61:6e:67:65:5f:4d:65 <RMS-Emac-Lab-2>
Feb 16 15:19:47 RMSInfoServer bootpd[64239]: replying to 192.168.1.47
Feb 16 15:19:47 RMSInfoServer bootpd[64239]: OFFER sent <no hostname> 192.168.1.47 pktsize 349
Feb 16 15:19:47 RMSInfoServer bootpd[64239]: service time 0.001576 seconds
Feb 16 15:19:47 RMSInfoServer bootpd[64239]: DHCP DISCOVER [en0]: 0,43:68:61:6e:67:65:5f:4d:65 <RMS-Emac-Lab-19>
Feb 16 15:19:47 RMSInfoServer bootpd[64239]: replying to 192.168.1.47
Feb 16 15:19:47 RMSInfoServer bootpd[64239]: OFFER sent <no hostname> 192.168.1.47 pktsize 349
Feb 16 15:19:47 RMSInfoServer bootpd[64239]: service time 0.000574 seconds
Feb 16 15:19:47 RMSInfoServer bootpd[64239]: DHCP DISCOVER [en0]: 0,43:68:61:6e:67:65:5f:4d:65 <RMS-Emac-Lab-20>
Feb 16 15:19:47 RMSInfoServer bootpd[64239]: replying to 192.168.1.47
Feb 16 15:19:47 RMSInfoServer bootpd[64239]: OFFER sent <no hostname> 192.168.1.47 pktsize 349
Feb 16 15:19:47 RMSInfoServer bootpd[64239]: service time 0.000435 seconds
Feb 16 15:19:47 RMSInfoServer bootpd[64239]: DHCP DISCOVER [en0]: 0,43:68:61:6e:67:65:5f:4d:65 <RMS-Emac-Lab-11>
Feb 16 15:19:47 RMSInfoServer bootpd[64239]: replying to 192.168.1.47
Feb 16 15:19:47 RMSInfoServer bootpd[64239]: OFFER sent <no hostname> 192.168.1.47 pktsize 349
Feb 16 15:19:47 RMSInfoServer bootpd[64239]: service time 0.000416 seconds
Feb 16 15:19:48 RMSInfoServer bootpd[64239]: DHCP REQUEST [en0]: 0,43:68:61:6e:67:65:5f:4d:65 <RMS-Emac-Lab-2>
Feb 16 15:19:48 RMSInfoServer bootpd[64239]: replying to 192.168.1.47
Feb 16 15:19:48 RMSInfoServer bootpd[64239]: ACK sent <no hostname> 192.168.1.47 pktsize 349
Feb 16 15:19:48 RMSInfoServer bootpd[64239]: service time 0.000942 seconds
Feb 16 15:19:48 RMSInfoServer bootpd[64239]: DHCP REQUEST [en0]: 0,43:68:61:6e:67:65:5f:4d:65 <RMS-Emac-Lab-19>
Feb 16 15:19:48 RMSInfoServer bootpd[64239]: replying to 192.168.1.47
Feb 16 15:19:48 RMSInfoServer bootpd[64239]: ACK sent RMS-Emac-Lab-19 192.168.1.47 pktsize 349
Feb 16 15:19:48 RMSInfoServer bootpd[64239]: service time 0.000786 seconds
Feb 16 15:19:48 RMSInfoServer bootpd[64239]: DHCP REQUEST [en0]: 0,43:68:61:6e:67:65:5f:4d:65 <RMS-Emac-Lab-20>
Feb 16 15:19:48 RMSInfoServer bootpd[64239]: replying to 192.168.1.47
Feb 16 15:19:48 RMSInfoServer bootpd[64239]: ACK sent RMS-Emac-Lab-20 192.168.1.47 pktsize 349
Feb 16 15:19:48 RMSInfoServer bootpd[64239]: service time 0.000608 seconds
Feb 16 15:19:48 RMSInfoServer bootpd[64239]: DHCP REQUEST [en0]: 0,43:68:61:6e:67:65:5f:4d:65 <RMS-Emac-Lab-11>
Feb 16 15:19:48 RMSInfoServer bootpd[64239]: replying to 192.168.1.47
Feb 16 15:19:48 RMSInfoServer bootpd[64239]: ACK sent RMS-Emac-Lab-11 192.168.1.47 pktsize 349
Feb 16 15:19:48 RMSInfoServer bootpd[64239]: service time 0.000727 seconds
Feb 16 15:19:49 RMSInfoServer bootpd[64239]: DHCP DECLINE [en0]: 0,43:68:61:6e:67:65:5f:4d:65
Feb 16 15:19:49 RMSInfoServer bootpd[64239]: dhcpd: IP 192.168.1.47 declined by 0,43:68:61:6e:67:65:5f:4d:65
Feb 16 15:19:49 RMSInfoServer bootpd[64239]: service time 0.000864 seconds
Feb 16 15:19:49 RMSInfoServer bootpd[64239]: DHCP DECLINE [en0]: 0,43:68:61:6e:67:65:5f:4d:65
Feb 16 15:19:49 RMSInfoServer bootpd[64239]: service time 0.000148 seconds
Feb 16 15:19:49 RMSInfoServer bootpd[64239]: DHCP DECLINE [en0]: 0,43:68:61:6e:67:65:5f:4d:65
Feb 16 15:19:49 RMSInfoServer bootpd[64239]: service time 0.000116 seconds
Feb 16 15:19:59 RMSInfoServer bootpd[64239]: DHCP DISCOVER [en0]: 0,43:68:61:6e:67:65:5f:4d:65 <RMS-Emac-Lab-19>
Feb 16 15:19:59 RMSInfoServer bootpd[64239]: replying to 192.168.1.48
Feb 16 15:19:59 RMSInfoServer bootpd[64239]: OFFER sent <no hostname> 192.168.1.48 pktsize 349
Feb 16 15:19:59 RMSInfoServer bootpd[64239]: service time 0.001540 seconds
Feb 16 15:19:59 RMSInfoServer bootpd[64239]: DHCP DISCOVER [en0]: 0,43:68:61:6e:67:65:5f:4d:65 <RMS-Emac-Lab-20>
Feb 16 15:19:59 RMSInfoServer bootpd[64239]: replying to 192.168.1.48
Feb 16 15:19:59 RMSInfoServer bootpd[64239]: OFFER sent <no hostname> 192.168.1.48 pktsize 349
Feb 16 15:19:59 RMSInfoServer bootpd[64239]: service time 0.000492 seconds
Feb 16 15:19:59 RMSInfoServer bootpd[64239]: DHCP DISCOVER [en0]: 0,43:68:61:6e:67:65:5f:4d:65 <RMS-Emac-Lab-11>
Feb 16 15:19:59 RMSInfoServer bootpd[64239]: replying to 192.168.1.48
Feb 16 15:19:59 RMSInfoServer bootpd[64239]: OFFER sent <no hostname> 192.168.1.48 pktsize 349
Feb 16 15:19:59 RMSInfoServer bootpd[64239]: service time 0.000472 seconds
Feb 16 15:20:00 RMSInfoServer bootpd[64239]: DHCP REQUEST [en0]: 0,43:68:61:6e:67:65:5f:4d:65 <RMS-Emac-Lab-19>
Feb 16 15:20:00 RMSInfoServer bootpd[64239]: replying to 192.168.1.48
Feb 16 15:20:00 RMSInfoServer bootpd[64239]: ACK sent <no hostname> 192.168.1.48 pktsize 349
Feb 16 15:20:00 RMSInfoServer bootpd[64239]: service time 0.000972 seconds
Feb 16 15:20:00 RMSInfoServer bootpd[64239]: DHCP REQUEST [en0]: 0,43:68:61:6e:67:65:5f:4d:65 <RMS-Emac-Lab-20>
Feb 16 15:20:00 RMSInfoServer bootpd[64239]: replying to 192.168.1.48
Feb 16 15:20:00 RMSInfoServer bootpd[64239]: ACK sent RMS-Emac-Lab-20 192.168.1.48 pktsize 349
Feb 16 15:20:00 RMSInfoServer bootpd[64239]: service time 0.000567 seconds
Feb 16 15:20:00 RMSInfoServer bootpd[64239]: DHCP REQUEST [en0]: 0,43:68:61:6e:67:65:5f:4d:65 <RMS-Emac-Lab-11>
Feb 16 15:20:00 RMSInfoServer bootpd[64239]: replying to 192.168.1.48
Feb 16 15:20:00 RMSInfoServer bootpd[64239]: ACK sent RMS-Emac-Lab-11 192.168.1.48 pktsize 349
Feb 16 15:20:00 RMSInfoServer bootpd[64239]: service time 0.000619 seconds
Feb 16 15:20:02 RMSInfoServer bootpd[64239]: DHCP DECLINE [en0]: 0,43:68:61:6e:67:65:5f:4d:65
Feb 16 15:20:02 RMSInfoServer bootpd[64239]: dhcpd: IP 192.168.1.48 declined by 0,43:68:61:6e:67:65:5f:4d:65
Feb 16 15:20:02 RMSInfoServer bootpd[64239]: service time 0.000737 seconds
Feb 16 15:20:02 RMSInfoServer bootpd[64239]: DHCP DECLINE [en0]: 0,43:68:61:6e:67:65:5f:4d:65
Feb 16 15:20:02 RMSInfoServer bootpd[64239]: service time 0.000123 seconds
Feb 16 15:20:12 RMSInfoServer bootpd[64239]: DHCP DISCOVER [en0]: 0,43:68:61:6e:67:65:5f:4d:65 <RMS-Emac-Lab-11>
We are getting many IP conflicts. Our clients come up with a message from IP Configuration which says (for example) '192.168.1.60 is in use by 43:68:61:6e:67:65 DHCP Server 192.168.1.10'
DHCP scopes have been recreated along with /etc/bootpd.plist /var/db/dhcpd_leases
Here is a snipit from a log to show you some of the strangeness. Any advice would be greatly appreciated.
Feb 16 15:19:37 RMSInfoServer bootpd[64239]: dhcpd: IP 192.168.1.46 declined by 0,43:68:61:6e:67:65:5f:4d:65
Feb 16 15:19:37 RMSInfoServer bootpd[64239]: service time 0.000715 seconds
Feb 16 15:19:37 RMSInfoServer bootpd[64239]: DHCP DECLINE [en0]: 0,43:68:61:6e:67:65:5f:4d:65
Feb 16 15:19:37 RMSInfoServer bootpd[64239]: service time 0.000167 seconds
Feb 16 15:19:37 RMSInfoServer bootpd[64239]: DHCP DECLINE [en0]: 0,43:68:61:6e:67:65:5f:4d:65
Feb 16 15:19:37 RMSInfoServer bootpd[64239]: service time 0.000093 seconds
Feb 16 15:19:37 RMSInfoServer bootpd[64239]: DHCP DECLINE [en0]: 0,43:68:61:6e:67:65:5f:4d:65
Feb 16 15:19:37 RMSInfoServer bootpd[64239]: service time 0.000121 seconds
Feb 16 15:19:47 RMSInfoServer bootpd[64239]: DHCP DISCOVER [en0]: 0,43:68:61:6e:67:65:5f:4d:65 <RMS-Emac-Lab-2>
Feb 16 15:19:47 RMSInfoServer bootpd[64239]: replying to 192.168.1.47
Feb 16 15:19:47 RMSInfoServer bootpd[64239]: OFFER sent <no hostname> 192.168.1.47 pktsize 349
Feb 16 15:19:47 RMSInfoServer bootpd[64239]: service time 0.001576 seconds
Feb 16 15:19:47 RMSInfoServer bootpd[64239]: DHCP DISCOVER [en0]: 0,43:68:61:6e:67:65:5f:4d:65 <RMS-Emac-Lab-19>
Feb 16 15:19:47 RMSInfoServer bootpd[64239]: replying to 192.168.1.47
Feb 16 15:19:47 RMSInfoServer bootpd[64239]: OFFER sent <no hostname> 192.168.1.47 pktsize 349
Feb 16 15:19:47 RMSInfoServer bootpd[64239]: service time 0.000574 seconds
Feb 16 15:19:47 RMSInfoServer bootpd[64239]: DHCP DISCOVER [en0]: 0,43:68:61:6e:67:65:5f:4d:65 <RMS-Emac-Lab-20>
Feb 16 15:19:47 RMSInfoServer bootpd[64239]: replying to 192.168.1.47
Feb 16 15:19:47 RMSInfoServer bootpd[64239]: OFFER sent <no hostname> 192.168.1.47 pktsize 349
Feb 16 15:19:47 RMSInfoServer bootpd[64239]: service time 0.000435 seconds
Feb 16 15:19:47 RMSInfoServer bootpd[64239]: DHCP DISCOVER [en0]: 0,43:68:61:6e:67:65:5f:4d:65 <RMS-Emac-Lab-11>
Feb 16 15:19:47 RMSInfoServer bootpd[64239]: replying to 192.168.1.47
Feb 16 15:19:47 RMSInfoServer bootpd[64239]: OFFER sent <no hostname> 192.168.1.47 pktsize 349
Feb 16 15:19:47 RMSInfoServer bootpd[64239]: service time 0.000416 seconds
Feb 16 15:19:48 RMSInfoServer bootpd[64239]: DHCP REQUEST [en0]: 0,43:68:61:6e:67:65:5f:4d:65 <RMS-Emac-Lab-2>
Feb 16 15:19:48 RMSInfoServer bootpd[64239]: replying to 192.168.1.47
Feb 16 15:19:48 RMSInfoServer bootpd[64239]: ACK sent <no hostname> 192.168.1.47 pktsize 349
Feb 16 15:19:48 RMSInfoServer bootpd[64239]: service time 0.000942 seconds
Feb 16 15:19:48 RMSInfoServer bootpd[64239]: DHCP REQUEST [en0]: 0,43:68:61:6e:67:65:5f:4d:65 <RMS-Emac-Lab-19>
Feb 16 15:19:48 RMSInfoServer bootpd[64239]: replying to 192.168.1.47
Feb 16 15:19:48 RMSInfoServer bootpd[64239]: ACK sent RMS-Emac-Lab-19 192.168.1.47 pktsize 349
Feb 16 15:19:48 RMSInfoServer bootpd[64239]: service time 0.000786 seconds
Feb 16 15:19:48 RMSInfoServer bootpd[64239]: DHCP REQUEST [en0]: 0,43:68:61:6e:67:65:5f:4d:65 <RMS-Emac-Lab-20>
Feb 16 15:19:48 RMSInfoServer bootpd[64239]: replying to 192.168.1.47
Feb 16 15:19:48 RMSInfoServer bootpd[64239]: ACK sent RMS-Emac-Lab-20 192.168.1.47 pktsize 349
Feb 16 15:19:48 RMSInfoServer bootpd[64239]: service time 0.000608 seconds
Feb 16 15:19:48 RMSInfoServer bootpd[64239]: DHCP REQUEST [en0]: 0,43:68:61:6e:67:65:5f:4d:65 <RMS-Emac-Lab-11>
Feb 16 15:19:48 RMSInfoServer bootpd[64239]: replying to 192.168.1.47
Feb 16 15:19:48 RMSInfoServer bootpd[64239]: ACK sent RMS-Emac-Lab-11 192.168.1.47 pktsize 349
Feb 16 15:19:48 RMSInfoServer bootpd[64239]: service time 0.000727 seconds
Feb 16 15:19:49 RMSInfoServer bootpd[64239]: DHCP DECLINE [en0]: 0,43:68:61:6e:67:65:5f:4d:65
Feb 16 15:19:49 RMSInfoServer bootpd[64239]: dhcpd: IP 192.168.1.47 declined by 0,43:68:61:6e:67:65:5f:4d:65
Feb 16 15:19:49 RMSInfoServer bootpd[64239]: service time 0.000864 seconds
Feb 16 15:19:49 RMSInfoServer bootpd[64239]: DHCP DECLINE [en0]: 0,43:68:61:6e:67:65:5f:4d:65
Feb 16 15:19:49 RMSInfoServer bootpd[64239]: service time 0.000148 seconds
Feb 16 15:19:49 RMSInfoServer bootpd[64239]: DHCP DECLINE [en0]: 0,43:68:61:6e:67:65:5f:4d:65
Feb 16 15:19:49 RMSInfoServer bootpd[64239]: service time 0.000116 seconds
Feb 16 15:19:59 RMSInfoServer bootpd[64239]: DHCP DISCOVER [en0]: 0,43:68:61:6e:67:65:5f:4d:65 <RMS-Emac-Lab-19>
Feb 16 15:19:59 RMSInfoServer bootpd[64239]: replying to 192.168.1.48
Feb 16 15:19:59 RMSInfoServer bootpd[64239]: OFFER sent <no hostname> 192.168.1.48 pktsize 349
Feb 16 15:19:59 RMSInfoServer bootpd[64239]: service time 0.001540 seconds
Feb 16 15:19:59 RMSInfoServer bootpd[64239]: DHCP DISCOVER [en0]: 0,43:68:61:6e:67:65:5f:4d:65 <RMS-Emac-Lab-20>
Feb 16 15:19:59 RMSInfoServer bootpd[64239]: replying to 192.168.1.48
Feb 16 15:19:59 RMSInfoServer bootpd[64239]: OFFER sent <no hostname> 192.168.1.48 pktsize 349
Feb 16 15:19:59 RMSInfoServer bootpd[64239]: service time 0.000492 seconds
Feb 16 15:19:59 RMSInfoServer bootpd[64239]: DHCP DISCOVER [en0]: 0,43:68:61:6e:67:65:5f:4d:65 <RMS-Emac-Lab-11>
Feb 16 15:19:59 RMSInfoServer bootpd[64239]: replying to 192.168.1.48
Feb 16 15:19:59 RMSInfoServer bootpd[64239]: OFFER sent <no hostname> 192.168.1.48 pktsize 349
Feb 16 15:19:59 RMSInfoServer bootpd[64239]: service time 0.000472 seconds
Feb 16 15:20:00 RMSInfoServer bootpd[64239]: DHCP REQUEST [en0]: 0,43:68:61:6e:67:65:5f:4d:65 <RMS-Emac-Lab-19>
Feb 16 15:20:00 RMSInfoServer bootpd[64239]: replying to 192.168.1.48
Feb 16 15:20:00 RMSInfoServer bootpd[64239]: ACK sent <no hostname> 192.168.1.48 pktsize 349
Feb 16 15:20:00 RMSInfoServer bootpd[64239]: service time 0.000972 seconds
Feb 16 15:20:00 RMSInfoServer bootpd[64239]: DHCP REQUEST [en0]: 0,43:68:61:6e:67:65:5f:4d:65 <RMS-Emac-Lab-20>
Feb 16 15:20:00 RMSInfoServer bootpd[64239]: replying to 192.168.1.48
Feb 16 15:20:00 RMSInfoServer bootpd[64239]: ACK sent RMS-Emac-Lab-20 192.168.1.48 pktsize 349
Feb 16 15:20:00 RMSInfoServer bootpd[64239]: service time 0.000567 seconds
Feb 16 15:20:00 RMSInfoServer bootpd[64239]: DHCP REQUEST [en0]: 0,43:68:61:6e:67:65:5f:4d:65 <RMS-Emac-Lab-11>
Feb 16 15:20:00 RMSInfoServer bootpd[64239]: replying to 192.168.1.48
Feb 16 15:20:00 RMSInfoServer bootpd[64239]: ACK sent RMS-Emac-Lab-11 192.168.1.48 pktsize 349
Feb 16 15:20:00 RMSInfoServer bootpd[64239]: service time 0.000619 seconds
Feb 16 15:20:02 RMSInfoServer bootpd[64239]: DHCP DECLINE [en0]: 0,43:68:61:6e:67:65:5f:4d:65
Feb 16 15:20:02 RMSInfoServer bootpd[64239]: dhcpd: IP 192.168.1.48 declined by 0,43:68:61:6e:67:65:5f:4d:65
Feb 16 15:20:02 RMSInfoServer bootpd[64239]: service time 0.000737 seconds
Feb 16 15:20:02 RMSInfoServer bootpd[64239]: DHCP DECLINE [en0]: 0,43:68:61:6e:67:65:5f:4d:65
Feb 16 15:20:02 RMSInfoServer bootpd[64239]: service time 0.000123 seconds
Feb 16 15:20:12 RMSInfoServer bootpd[64239]: DHCP DISCOVER [en0]: 0,43:68:61:6e:67:65:5f:4d:65 <RMS-Emac-Lab-11>
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